The bodice back of this garment has two darts (on the half-block); one dart in the waist, the other in the shoulder.
This bodice is actually a 3-D version of the flat Bodice Block Back that is used on this website.
The style that is created by the Block is called Style A; other styles that are created by moving the shoulder dart are Styles 01-03.
Flat Block vs Technical Flat
Figure 1: On the left is the Bodice Block Bacl, with the darts open . On the right is the Technical Flat of that block; a 3D representation with the dart closed. The blocks are always shown as half the body, as the basic pattern is symmetrical.